These data were published in December 2005 in Offender Management Caseload Statistics 2004. A copy of this statistical bulletin is in the House of Commons Library and may also be found at the following website:
Annual data on FNPs, and other characteristics on the prison population, have been published each year in Offender Management Caseload Statistics from 2003 and before that in Prison Statistics England and Wales. Both publications are in the House of Commons of Library and may also be accessed via the Ministry of Justice website at:
These figures have been drawn from administrative IT systems which, as with any large scale recording system, are subject to possible errors with data entry and processing.
To ask the Secretary of State for Justice what criteria his Department uses to determine whether a prison is to be market-tested. 
Public sector prisons were short listed for market test if identified as either poorly performing or high cost. Final selection from the short list was made on the basis of a number of operational criteria and took account of wider evidence, such as HM Inspectorate of Prisons reports.
Prisons: Mental Health Services
To ask the Secretary of State for Justice how many prisoners in (a) Essex and (b) the East of England region have been transferred from prison to a secure mental health unit in each of the last five years. 
The number of prisoners transferred in each of the last five years is given in the table.
East of England
Prisons: Operating Costs
To ask the Secretary of State for Justice how much was spent on the running costs of each (a) private and (b) public sector prison in England and Wales in each year since 1990. 
The information requested spans a period of 19 years and requires information on over 130 prisons, which due to changes in structures, funding sources and accounting principles over this time is neither straightforward to produce nor comparable. These data are not held centrally. However some information can be found in the Prison Service annual 16 Jun 2009 : Column 266W
report and accounts which shows direct spend at prisons each year back to 1994-95 and copies of which are available in the Library of both Houses of Parliament. Current budgets for each prison in 2008-09 is shown in the table.